mesa: Make MESA_SHADER_CAPTURE_PATH skip shaders with Name == -1.

Shaders with shProg->Name == ~0 (aka 4294967295) are internal meta
shaders that we don't really want to capture.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>

src/mesa/main/shaderapi.c

@@ -1094,7 +1094,7 @@ _mesa_link_program(struct gl_context *ctx, struct gl_shader_program *shProg)
 
    /* Capture .shader_test files. */
    const char *capture_path = _mesa_get_shader_capture_path();
-   if (shProg->Name != 0 && capture_path != NULL) {
+   if (shProg->Name != 0 && shProg->Name != ~0 && capture_path != NULL) {
       FILE *file;
       char filename[PATH_MAX];